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Activated alumina

About: Activated alumina is a research topic. Over the lifetime, 1430 publications have been published within this topic receiving 31090 citations.


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TL;DR: In this article, the adsorbent was characterized using SEM, FTIR and FTIR to study the pore structure and surface functional groups of arsenic adsorbed by activated alumina.
Abstract: Arsenic is a toxic element found naturally in groundwater Due to its carcinogenicity, risk for heart diseases and diabetes, arsenic needs to be removed from groundwater for potable application ‘Anjili’ tree Sawdust was chemically modified with ferric hydroxide and activated alumina (SFAA) and used as an adsorbent for the removal of arsenic from groundwater The adsorbent was characterized using SEM, FTIR to study the pore structure and surface functional groups Effect of contact time, initial concentration, pH, particle size and temperature was studied Arsenic adsorbed by SFAA followed Freundlich adsorption isotherm Maximum sorption of arsenic by SFAA adsorbent occurred at pH 65 Arsenic sorption kinetics followed Pseudo-second-order model The maximum sorption capacity at 303 K was found to be 5432 mg/g for As(III) and 7760 mg/g for As(V) Interference of other ions on the adsorption was in the order of PO4 3− > SO4 2− > HCO3 − > NO3 −

11 citations

Patent
27 Aug 1993
TL;DR: A chromatographic process for deacidification of vegetable oils at ambient temperature is described in this article, where crude vegetable oil is dissolved in a solvent such as isopropyl alcohol and passed through a column of activated alumina (aluminum oxide) at room temperature.
Abstract: A chromatographic process for deacidification of vegetable oils at ambient temperature. According to the process, which can be retrofitted into deacidification operations using miscella refining or solvent extraction, crude vegetable oil is dissolved in a solvent such as isopropyl alcohol and passed through a column of activated alumina (aluminum oxide) at room temperature. The process, which eliminates physical contact between both oil and an alkaline reagent and oil and water, simplifies subsequent bleaching processes by also removing some color pigments. The spent alumina can be reactivated by washing it with a dilute solution of sodium hydroxide or potassium hydroxide.

11 citations

Patent
27 Jan 1999
TL;DR: An adsorbent for removing HCl from fluid streams comprising activated alumina impregnated with alkaline oxide and promoted with phosphate or organic amine or a mixture thereof is described in this article.
Abstract: An adsorbent for removing HCl from fluid streams comprising activated alumina impregnated with alkaline oxide and promoted with phosphate or organic amine or a mixture thereof. A method of making such adsorbent and a method of removing HCl from fluid streams using such adsorbent.

11 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20237
202218
202118
202031
201941
201839